Most of the ones you see there are already the newer type extensions, I believe. Regardless, since I'm running Firefox ESR 52.0.2 (64 bit) in Slackware, it'll be some time before I ever see v57.x on my system.

I had RoboForm but it would not work in MX-16. Luckily I had kept MX-15 running so I was able to gather all my passwords and transfer them to KeePass. Did me a favor really as I think KeePass will be better for my needs.

InstallARCHYou'll never need to install it again
"I did and I'm really happy"~~~~~~~~~~~~~

I'm running Firefox 51.0.1 in Slackware since 52 ESR dropped support for my Java plugin. And I don't see my moving past that for a long time.

I swore off all things Java many moons ago, so I didn't have that issue that you had above when I went to 52.x.

I see my list on those above -- but would recommend Down Them All for anybody who downloads big iso files, etc. It (transparently) starts up a scheme that breaks the file into 4 segments and gets them all at the same time. Won't hurt anything if you only connect to a service that gives you full bandwidth on a single connection. Some sites won't allow multiple connections, again not a problem.

I also add Title Save and the great Hide Tab Bar With Only One Tab -- recovers the wasted space that layout feature uses.

Self-destructing Cookies is a hand little tool. I use it mostly because it's an easy way to protect some cookies (logins) that I don't want to ever get dumped. I set FF to dump all cookie and history when I close it, so it's handy to have SDC protect the cookies I want to save with just one clicky.

actually realized it was pretty easy to tell which ones i liked most as i made donations for these (except grammerly).

Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience. ~C. S. Lewis

I just installed the AntiAdblock killer script for Greasemonkey. Interestingly it needs to be activated to work with uBlock Origin, and while in the UBO settings I noticed that it can block Disconnect tracking lists as well! I used Disconnect for a while and don't recall problems with it but if you can use the one extension to do the job of two, I call that a win!
selectivecookiedelete does basically the same thing as Self-Destructing Cookies afaik.
uBlock Origin is a better ad blocker than AdBlock Plus using vastly less resources. Comparison - https://github.com/g...ciency-compared

I thought I was a conservative extension user. Turns out I have more than anyone else has posted so far. edit - except Eric.

registered Linux user number 324659 || The importance of Reading The *Fine* Manual! :DKXStudio
For the things we have to learn before we can do them, we learn by doing them.